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Just wondering if the PC may still have an infection, even though you've checked it, they can often stay 'hidden'.<br />
Recommend downloading, then updating Malwarebytes' Anti-Malware:<br />
<a href="http://www.malwarebytes.org/mbam.php" rel="ugc">http://www.malwarebytes.org/mbam.php</a><br />
When updated, reboot into Safe Mode by selecting F8 at bootup &amp;&nbsp;run a scan.<br />
<br />
You could also tTry the Kaspersky free online virus scanner which is a good way to find out if you have any viruses or spyware without having to uninstall your existing antivirus software&gt;<br />
<a href="http://www.kaspersky.co.uk/virusscanner" rel="ugc">http://www.kaspersky.co.uk/virusscanner</a><br />
<br />
<br />
&gt;&nbsp;0x00000050: PAGE_FAULT_IN_NONPAGED_ARE<wbr />A &lt;<br />
In addition to RAM error can also be due to this&gt;<br />
<br />
Requested data was not in memory. An invalid system memory address was referenced. Defective memory (including main memory, L2 RAM cache, video RAM) or incompatible software (including remote control and antivirus software) might cause this Stop message, as may other hardware problems (e.g., incorrect SCSI termination or a flawed PCI card).<br />
<a href="http://aumha.org/a/stop.htm" rel="ugc">http://aumha.org/a/stop.htm</a><br />
<br />

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 Previously &quot;still have&quot; should have read &quot;have&quot;. <br />
<br />
You could also check for a minidump, normally located in c:\windows\minidump\ &nbsp; &nbsp;<br />
or &nbsp;%systemroot%\minidump\<br />
<br />
It (or they) will contain information about the bugcheck that was generated. <br />
Can you paste the latest dump(s) in the &quot;Attach Code Snippet&quot; box where we can get it analysed. &nbsp;You'll need to rename single minidumps first with a .txt extension. &nbsp; &nbsp;Alternatively, zip them before attaching.<br />
<br />
You may need to disable auto restart:<br />
Right click My Computer &gt;&nbsp;Properties &gt;&nbsp;Advanced &gt;&nbsp;Startup and Recovery Settings and uncheck Automatically Restart.<br />

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Expect you have tried interchanging the RAMs, also ensuring they're really well seated?<br />
<br />
Also you could visually check motherboard for bloated/leaky capacitors &gt;<br />
<a href="http://en.wikipedia.org/wiki/Capacitor_plague" rel="ugc">http://en.wikipedia.org/wiki/Capacitor_plague</a><br />
<br />
Does it reboot almost instantly? &nbsp; <br />
Thinking along the lines of maybe overheating ... CPU/heatsink assembly, &amp;&nbsp;dust and/or thermal paste failure causing CPU to detach from heatsink? &nbsp; &nbsp;Fans ok?
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An afterthought, but no hurry, it can be investigated later ... the fact that you can only boot to normal with only ~one~ RAM (in either slot) makes it conceivable that it could be due to the power supply having the inability to supply sufficient current for two RAMs. &nbsp;It could also be the mobo of course.<br />
So acquiring another PSU later is a ~possible~ option.
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Hi Guy's<br />
Thanks to all the responces so far very helpful. I will have a play with everything suggested including the PSU and let you know how I get on.<br />
Really appreciate the help guy's, thanks again.<br />
Will let you know how I get on, and which if any responce solves my issues.<br />
Watch this space.<br />
Cheers.<br />
Simon
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Hi folks,<br />
If this problem was related to a faulty RAM chip, wouldn't the same symptoms exist when booting to safe mode? Does safe mode handle memory differently?<br />
hambletonit, I don't mean to piggy back on your question but I am experaincing the same problem with a customers PC, however its about 90 miles away so I'm reluctant to drive down to reseat RAM chips if I can possibly avoid it. Maybe we could compare symptons/hardware spec and narrow the possibilities.<br />
Thanks <br />
QZ
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I can confirm that it resolved my problem, with exact same issue<br />
<br />
Page fault in non paged error 0x00000050 - Running AVG 8.0<br />
<br />
I remove Acer eLock as instructed and all works fine<br />
<br />
Thank you
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I can also confirm that Qzee's fix solves this blue screen 0x00000050 crash on an Acer PC Tower.<br />
<br />
Removed the Acer eLock and no more crashing.<br />
<br />
I think it may be related to the most recent AVG updates, as the particular PC that this occured on has been running the AVG / Acer eLock combination for about 3 or 4 Months.<br />
<br />
Thanks for the information
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Thank you so much QZee I wouldnt have found that in a month of sunday. As soon as I read your reply I was on it and it was sorted in no time. Thanks also to everyone else of course for your help and support, very much appreciated. Simon Baker
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Acers....lol. &nbsp;I also confirm this fix. &nbsp;I first tried testing hardware, memory, unplugging usb cables, uninstalling drivers, etc. &nbsp;I even did a repair install. &nbsp;Now I found this issue and uninstalled both avg and the acer elock program. &nbsp;It's working fine now. &nbsp;I love experts exchange!<br />
<br />

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This worked for me thnaks!!
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<b>Also works on AVG 9. &nbsp;Thanks a bunch!!!</b>
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<div class="content wysiwyg-content">
Hi Guy's.<br />
My PC is rebooting with an error of page_fault_in_nonpaged_are<wbr />a with a load of numbers<br />
0x00000050 / 0xed77af35 / 0x8053ce32.<br />
It will boot in safe mode so I looked for infections etc and restored it to an earlier time and looked on the internet for help. I saw advie on reseating the RAM so did that and found that it will boot normally with either RAM chip in either slot but not both. Tried a new RAM module but again does the same.<br />
So the PC wont boot with both modules, new or otherwise, but will boot in safe mode with both installed.<br />
Also saw advice on disabling the page file etc so did that but still having issues.<br />
I'm really lost as to what to do next, your help would be very welcome.<br />
Many thanks.<br />
Simon Baker
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</div>


Hi Guy's.
My PC is rebooting with an error of page_fault_in_nonpaged_area with a load of numbers
0x00000050 / 0xed77af35 / 0x8053ce32.
It will boot in safe mode so I looked for infections etc and restored it to an earlier time and looked on the internet for help. I saw advie on reseating the RAM so did that and found that it will boot normally with either RAM chip in either slot but not both. Tried a new RAM module but again does the same.
So the PC wont boot with both modules, new or otherwise, but will boot in safe mode with both installed.
Also saw advice on disabling the page file etc so did that but still having issues.
I'm really lost as to what to do next, your help would be very welcome.
Many thanks.
Simon Baker

Boot error Page Fault In Nonpaged Area 0x00000050

Microsoft Windows XP is the sixth release of the NT series of operating systems, and was the first to be marketed in a variety of editions: XP Home and XP Professional, designed for business and power users. The advanced features in XP Professional are generally disabled in Home Edition, but are there and can be activated. There were two 64-bit editions, an embedded edition and a tablet edition.